Drafting rollers for spinning and like machines



April 19, 1966 R. MORELL 3,246,372

DRAFTING ROLLERS FOR SPINNING AND LIKE MACHINES Filed April 1, 1963 United States Patent 3,246,372 DRAFTING ROLLERS 130R SPINNING AND LHKE MAQHINES Richard Morell, Northenden, Manchester, England, assignor, by mesne assignments, to Maremont Qorporation, Chicago, ilL, a corporation of Illinois Filed Apr. 1, 1963, Ser. No. 269,445 Claims priority, application Great Britain, Apr. 10, 1962, 13,692/ 62 1 Claim. (Cl. 19-258) This invention relates to improvements in drafting rollers for drawing and like textile fibre drafting machines of the kind having end pivots.

It has been proposed to Weight the top rollers of drawing frames and to support on the ends of the rollers in nebs or bearings and also to apply the pressure on the rollers for drafting by magnetic attraction between the top and bottom rollers.

Top rollers supported in the centre have been proposed but have proved unsatisfactory due to rocking on the lower rollers and therefore not remaining parallel therewith.

The object of the present invention is to provide the pivots of the top rollers with nebs or guides so constructed and arranged that piecing up may be carried out by passing the yarn between the pivot and the neb or guide for uniting with the advancing sliver.

According to the invention the pivots on the top rollers engage a neb or bearing on a locating surface, the pivots being formed with a quick thread to reduce the area of surface contact and to assist in piecing up.

The invention will be described with reference to the accompanying drawings.

FIG. 1 is a diagrammatic elevation showing yarn on its passage through a drafting mechanism in a spinning frame.

FIG. 2 is an enlarged plan view of a top roller.

FIG. 3 is an end view along the line 33 of FIG. 2 partly in section of a top and bottom roller showing an end being pieced up.

Yarn passes to a pair of delivery drafting rollers A A and through a lappet or guide 12 on its way to a traveller b on a ring b and is wound onto a package b as illustrated in FIG. 1. A suction nozzle or under clearer (not shown) may be provided for collecting any broken end from the nip of the rollers in known manner.

Drafting pressure is preferably applied to the top roller A and bottom roller A by magnetic attraction the top rollers A being formed with pivots a at their ends to engage on their sides the substantially vertical locating surfaces d of nebs or bearing guides d, the pivots a being arranged to provide a minimum of contact with the nebs or bearings. The bearings d are supported by any suitable stationary support 1.

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The pivots a are formed with an outwardly directed quick thread e right handed at one end and left handed at the other end for engaging the neb or bearing as shown in FIG. 2.

The neb is open at its top, bottom and rear as shown in FIG. 3 and the lower part d of the neb or bearing engaging the roller pivot a is formed vertical or substantially vertical to allow a broken end 2 of the yarn 1 to be inserted between the pivot a and the neb d and brought up at the rear of the roller for uniting with the advancing sliver during piecing up as shown in FIG. 3.

The nebs or bearings d may be moulded from synthetic material or any nonmagnetic material or a combination of synthetic material and a nonmagnetic material and when employing magnetic weighting of the rollers A A the neb or hearing only supports a proportion of the weight of the roller and lubrication is unnecessary which is an important feature in connection with the use of magnetic rollers.

When using mechanically weighted rollers with pivots at their ends the piecing up round the roller pivots is impracticable due to the presence of lubricant which stains the yarn.

The formation of the pivots a and nebs or bearings d is particularly applicable when magnetic weighting is provided and greatly facilitates piecing up.

What is claimed is:

A drafting roller system comprising top and bottom delivery rollers, said bottom roller supporting said top roller, an axially extending terminal pivot at each end of said top roller, a bearing guide, open at its top, bottom and rear, in association with at least one of said pivots, such guide having a substantially vertical locating surface engaged by said one pivot, a stationary structure supporting said guide, and, on said one pivot, spacing means comprising an outwardly directed quick thread to reduce the area of contact between said one pivot and associated guide to enable yarn to be passed therebetween and around the end of said one pivot during piecing up.

References Cited by the Examiner UNITED STATES PATENTS 2,228,394 1/1941 Marvin et al. 308-72 2,260,130 10/1941 Armstrong et al. 19-258 X 2,302,126 11/ 1942 Kennedy 29129.5 2,323,882 7/1943 Shaw 19275 X 2,510,549 6/1950 Buchi 308122 2,610,363 9/1952 Robinson et al 19-294 FOREIGN PATENTS Ad. 29,942 9/ 1925 France. 875,145 6/ 1942 France.

H DONALD W. PARKER, Primary Examiner. 

